Atmospheric emissions of organochlorine compounds from steel industry in Brescia province (Lombardy, Italy)

Sergio Savoldelli, Francesco Bonomi, Gaia Bramanti, Tiziana Frassi

Abstract


Electric arc furnace steelmaking is a key element of the significant industrial structure of Brescia province (Lombardy,Italy). In this province are located thirteen plants for steel production (mostly from scrap) over forty-two in whole Italy.
This  peculiar  high  concentration  of  steel  factories  in  a  single  province  allows  local  environmental  agency  (ARPA Lombardia Dipartimento di Brescia) to evaluate different production layouts and different abatement plants, thus permitting to reasonably point out which variables mostly influence environmental performances. Spontaneous evolution of industrial processes and growing concern from public opinion and public regulations has led across the years to a continuous improvement of industrial emission abatement techniques. The authority charged to release IPPC authorizations has recently stated that steel factories have to measure, besides well-known typical pollutants from these sources, polychlorobiphenyls released in emissions to atmosphere. In this study environmental performances before and after newly
installed abatement technologies (namely: blowing of activated carbon powder after quench tower) have been evaluated in respect to PCDD/PCDF and PCB emissions. Clearly uneven abatement performance has been identified between different  layouts,  and  some  possible  explanations  have  been  put  forward,  with  reference  to  synthesis  and  possible pathways of observed pollutants. Finally a gross estimate of overall atmospheric release of PCB and PCDD/PCDF from
steel production plants has been evaluated, and is presented a general fingerprinting of stack emissions measured PCB congeners.


Keywords


PCB, PCDD/F, steel industry, activated carbon, air emissions

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References


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